11102221201221 has 16 divisors (see below), whose sum is σ = 16464036179200. Its totient is φ = 7394145321024.

The previous prime is 11102221201219. The next prime is 11102221201259. The reversal of 11102221201221 is 12210212220111.

11102221201221 is a `hidden beast` number, since 11 + 10 + 2 + 221 + 201 + 221 = 666.

It is not a de Polignac number, because 11102221201221 - 2¹ = 11102221201219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11102221201194 and 11102221201203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11102221201271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203735581 + ... + 203790066.

It is an arithmetic number, because the mean of its divisors is an integer number (1029002261200).

Almost surely, 2^{11102221201221} is an apocalyptic number.

It is an amenable number.

11102221201221 is a deficient number, since it is larger than the sum of its proper divisors (5361814977979).

11102221201221 is a wasteful number, since it uses less digits than its factorization.

11102221201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407526665 (or 407526659 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11102221201221 its reverse (12210212220111), we get a palindrome (23312433421332).

The spelling of 11102221201221 in words is "eleven trillion, one hundred two billion, two hundred twenty-one million, two hundred one thousand, two hundred twenty-one".